Two are Toronto-area Liberal strongholds, while the third is a tight race in the Montreal suburb of Terrebonne between the Bloc Quebecois and the governing party.
The byelections were called to replace Liberal MPs Bill Blair and Chrystia Freeland, and after the courts overturned Terrebonne’s election result from last year — which was won by the Liberals by just one vote.
The Liberals stand at 171 seats in the House of Commons after attracting five opposition MPs to cross the floor.
